First and foremost, I like almost every version of Raiden. However, I'm already tired of the "wise mentor that makes a ton of mistakes" characterization that he's been having since MK4.
He was also a good guy in MK2 but then he missed MK3. He wasn't brought back until MK Trilogy.
Then there was Dark Raiden in the 3D era, which was fine, an interesting twist of the character. They botched it in MK11, though.
At this point I'm missing the original Raiden. He was more of an asshole who didn't care much about Earth lol it's like he just wanted to prove he was a badass fighter.
In fact, he sounds mysterious in the original bio. Like... a god was invited to the tournament?! Is he really a god? That's something the other fighters would be wondering.
And the portrayal of Raiden by Christopher Lambert in the MK Movie is interesting because while his Raiden was a good guy, he was also a sarcastic smartass and it's so entertaining.
Like, can you imagine our current Raiden slow-clapping at the Earthrealm warriors and saying "what are you going to do about Kronika?" with a smug face.
I think going back to a more sarcastic and badass Raiden that could still be a good guy would be the freshest take on the character in decades.